5 MH TO 400 MH, 100 B High Precision Limiting - Logarithmic Amplifier

The AD8306 is a complete IF limiting amplifier, providing both an accurate logarithmic (decibel) measure of the input signal (the RSSI function) over a dynamic range of 100 dB, and a programmable limiter output, useful from 5 MHz to 400 MHz.

An evaluation board is available for this product and may be ordered using the following product number: AD8306-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.

* Complete, Fully Calibrated Log-Limiting IF Amplifier

* 100 dB Dynamic Range: –91 dBV to +9 dBV

* Stable RSSI Scaling Over Temperature and Supplies:

20 mV/dB Slope, –95 dBm Intercept

±0.4 dB RSSI Linearity up to 200 MHz

* Fully Differential Inputs, RIN = 1 kΩ, CIN = 2.5 pF

* Single Supply of +2.7 V to +6.5 V at 16 mA Typical

* Programmable Limiter Gain and Output Current

Differential Outputs to 10 mA,

2.4 V p-p

Overall Gain 90 dB, Bandwidth 400 MHz

Constant Phase (Typical ±56 psDelay Skew)

* 500 ns Power-Up Time, <1 mA Sleep Current